Type-writing machine.



N. H. ANDERSON.

TYPE wnnme MACHINE. APPLICATION FILED OCLH. I913.

Patentefl Fell). 5,1918.

3 SHEETS-SHEET i.

N. mmmasow.

TYPE WRITING MACHINE;

APPLICATION FILED OCT- ll, l9l3.

Patented Feb. 5, 11918 3 SHEET 8-SHEET 3.

l/VI/EIVTOR I WITNESSES.

NTLS H. ANDERSON, 0F MIDDLETO'WN, CONNECTICUT, ASSTGNOW TO THE NOTSIIELESS TYPEWRITEE COMPANY, OF MIDDLETOWN, CONNECTICUT, A GORPOW CQNNEGTICUT.

it TION UT nn-wnrrme nacnrnn'.

-To all whom it may concern:

mechanism and associated and coacting parts.

One of the objects of the present inven- 5 tion is to provide a carriage shifting mechanism which will be simple and practical in its construction and durable and efficient in action.. Another object is to provide a car- I'iage shifting mechanismof the above character which will be particularly applicable.

to silently operating machine s. A further object is to provide practical "means'for so mounting the parts as to permit various adjustments thereof as may"be necessary, as

well as to enhance their ease of movement and reduce the wear on such parts. Other objects will be in part. obvious and in part pointed out hereinafter.

The invention accordingly consists in the features of construction, combinations of elements and arrangements of parts which I will be exemplified in the construction hereinafter set forth, and the scope of the appli cation which will be indicated in the following claims.

In the accompanying drawings wherein is shown one of the various possible embodiments of this invention,

Figure 1 is a plan view of the complete carriage shifting mechanism and such associated and coacting parts as are necessary to understand the present invention;

Fig. 2 is a sectional elevation of the shift mechanism in normal or inactiveposition;-

Fig. 3 is a similar view with parts shown in shifted position for printing upper-case characters, such as-capital letters;

Fig. 4 is a similar view showing the parts in shifted position for printing lower-case characters or figures;

Specification of Letters Patent.

Application filed October 11, 1913. Serial No. 794,595.

Fig. 5 is a detail sectional view taken \on the line s '-s, Fig. l;

Fig. dis a detail view showing the means for l1m1t1ngthe movement of a shifted part;

and

7-is' an enlarged detail View, partly in section, showingthe mounting of one end of the shift rock shaft. 1 I

Similar reference characters refer-to similar parts throughout the several views of the drawings.

The present invention will be hereinafter 1 described with relation to a Noiseles's typewriting machine, to the application of which it is particularly designed, although it is to V be-understood that various features of the present invention are'equally applicable to other forms of typewriting machines.

The Nolseless type'writing machine, as is well known, comprises a longitudinal reciprocating carriage traveling along a horizontally disposed shift rail positioned in the upper rear part of the machine. Radially ception of the shift mechanism forming the Sllb](3t of the present invention, are all,

broadly speaking, of such well-known general character and function as not to require illustration and a detailed description thereof, as they form no part of the present invention except in so far as certain of these features may enter broadly into the'combinations hereinafter claimed.

Referring now to the drawings in detail, and more particularly to Figs. 1' and 2, the carriage above mentioned is adapted to travel along a suitable shift rail 1. which is moved upward or downward asthe'mechanism is operated to assume positions shown in Figs.- 3 and 4 respectively, by means of the capital shift key 2 or the figure. shift key 3 shown at the side of the machine adjacent the letter keys of the key-board. The figure disposed pressure-operated type carriers shift key l ma is and are each pivotally connected at 12 and 11 to floating links 14 and 13 respectively. The opposite ends of these links are in turn pivotally connected at 15 and 16 to a float ing lever or rocking member 17. This rocking member 17 is pivotally supported at 18 in a yoke 20 pivotally mounted at 21 between forwardly extending ears of a bracket 22. The rocking member 17 has three arms, the two shorter of which are connected to the floating links 13 and 14, while the rearwardly extending longer arm is pivotally connected at the point 23 to a vertically disposed link 24, the opposite end of the nnk being pivotally connected at 25 to an arm 26 secured to a main shiftrock shaft 27. This rock shaft also carries near its ends, arms 28 and 30 as more clearly shown in Fig.1, each arm being provided at its rear end with trunnion blocks 31 adjustably secured to the lowerend of vertically dlsposed connecting members or links 32 supporting the end of the shift rail 1 upon which the carriage travels.

In shifting the carriage downward into a position for printing figures as shown in Fi l 4, the shift key lever 4 is-depressed an rocks about the pivotal connection 5 on the bracket 7 upon which it is supported into the position shown. It is evident that the distance from thecenters 6 and 16 tends to' shorten, consequently the long or rearwardly extendin arm of the rocking member 17 is rocked ownward, causing the yoke 20 to be moved toward the center 6 about which the shift key turns. This downward movement of the rocking member'transmits a rotary motion to the main rock shaft 27 through the, vertically disposed link 24 connected. at its lower end to the rear end of the intervening arm 26. 1 This rock shaft in turn transmits motion to the vertically disposed links 32 and the shift rail along which the carriage travels, thus bringing the carriage downward in a proper printing .position for receiving the lower bank of characters, or figures.

The capital shift key lever 8 plays an important part during the operation of the figure shift key lever, for the centers 10, 11 and 15 in the train of mechanism to the rockin member 17 will be a straight line and he 6. against deflection or overthrow by an adjusta le padded stop 33 acting on one I A side and the coil spring 34 acting upon the other, as shown in Fig. 1. In practice it maybe desirable to'bring these pivotal cen- Laeaevo ters or points slightly out of alinement, the middle pivot 11 being lower than the others so that when the figure shift key lever is depressed the capital shift ke lever through the short floating link 13 wi hold the upper end of this rocking member 17 in relatively fixed, position or against forward movement thereof, thus insuring the desired movement to the rocking member.

The capital shift key lever 8 and intermediate mechanism operates in substantially the reverse manner in order to rock the rocking member 17 u ward to rotate the main shift rock shaft 2 and connecting arms 28 and 30 in the opposite direction to raise the vertically disposed connecting links 32 and move the carriage into proper printing position for receiving the capital letters, as clearly shown in Fi 3 of the drawings. The figure shift key ever is also arrested m normal 51051131011 by an adjustable padded stop 35 an is held in contact with this sto by a vertically disposed coil spring 36 whic a1ds 1n the return of the parts to normal position.

The present machine is provided with two capital keys, one at each side of the keyboard and a figure key upon one side in order to assist the operator when operating under the touch system.

In order that the depression of either capital key may produce the desired results, a rock shaft 40 is mounted in suitable brackets 41 projecting forwardly from the central transverse support 7 as shown in Figs. 1 and 2. At one end of this shaft 40 is fastened a, key lever 42 held against rotation thereon in anywell-known manner, such for example, as an irregular shaped hub nut 43 as indicated. To the opposite end of the shaft is secured a downwardly extendin rm 44 ivotally connected at its lower en to a li 45 having in its opposite end an end of an arm 48 projectin downwardly from the capital shift key ever 8, which will cause this shift key lever to rotate on its pivot 10 and operate the shifting mechanism in the manner above described. This auxiliary'key lever 42 is returned to its normal position by a spring 50 coiled about the auxiliary rock shaft 40 having one end resting against the stationary part of the frame of the machine and the opposite end secured to an adjustable collar 51 rotatively mounted upon the shaft, thus furnishing a means by which the necessary tension of the spring may be obtained in order to hold the auxiliary shift key lever in its normal position. When the ca ital shift key 2 at the opposite side of t e keyboard is operated it is permitted to have an independent movement by reason of the stud and slotconnection 46-47 above described, in which the stud opening or slot 46 engaging a stud 47 on the t eatre is secured to .an adjustable, supportpro vided with an'automatic, or self-locking adjusting nut 56, supported from a stationary bracket'fil'. This spring 54: serves to aid "11 the return of the shifting mechanism to normal position from either of the shifted positions, it being understood that the yoke 20 shifts toward the main pivots of the shift key levers when actuated. As the movement of the oke in either case is slight, I

it forms a very esirable part to attach the return spring,-'in fact, by soattaching the sprinian overloadin of the 'stroke o'feither shift connected with thefshift key levers adjacent their pivoted supports, also serve to return the shift key levers to normal position. The primary object of these latter springs is, however, to maintain the centers of one toggle formed by the key levers and intervening floating links in normal position when operating the other shift key as previously described. In order to reduce the strain centered upon these return springs as much a as possible, the carriage is balanced to a certain extent by spiral balance springs as shown in Fig. 1. The inner ends of these springs are connected to an adjustable collar 61 adapted to be actuated by a worm and gear mechanism 62, the outer ends being attached to the frame of the machine.

When printing a list of numbers or a sentence entirely in capital letters, for example, it is sometimes desirable to hold the carriage in shifted position for a relatively,

long period of time. Tn order to accomplish this without the necessity of the operator using one hand to hold down one of the shift key levers, auxiliary locking levers 63 and 64 are pivotally mounted upon the figure and "capital. shift key levers respectively; These auxiliary locking levers are provided at their lower ends with hook.

7 portions 65 adapted to engage sheetmetal venient portion of chine.

their coacting stops. The locking levers are held in their locking position by the upward mounted padded stop 52 is secured ey atthe en thereof,- isjprevented. The springs 34; and 36 above referred to pull exerted thereon in the return sprin 3t and 36 of the shifting levers so that in order to unlockeither lever 63 .or- 64 it is only necessary to depress the body portion gsf of the respective shift key 1ever,.thereby permitting the return springs of the lockmg levers to act immediately and withdraw the hook-portions from the. coacting stops.

It Wlll. also be noted from the above that the entire shift mechanism is-so arranged that should the capitalashift key leverbe looked, as shown-in Fig-"3, for. example, it.- can be released by pressing thefi ure shift key. This is due tothefactthat t e centers I 10, 11-and'15 ofzthe wtoggleformed bythe.

capital shift key-lever and'link are not in line, and bydepressing the figure shiftkey lever in whichthecenters are me straight line, 1t will-tend to rockthe yoke 20 toward the center of :the shift key. levercand forcethe capital shift 'key leverdown ward in the same manner-as the operator lever. This-resultiis obtained by reason of the fact that the momentum is transmitted to point-15; and connectedlinks and moves them prior to transmitting an 'efl'ective movement to a more remote part of the mechanism. This is also reversed in the case of the figure shift lever being locked down, as shown inFig. 4:. ][t can be unlocked by pressure on'the capital. shift key lever as above described. To further assist and insure the return of the capital shift lever from locked position when figure shift key lever is depressed, an arm 70, as shown clearly in Fig. 3, extending rearwardly from the yoke, carries at its rear end an adjusting screw 71 made to engage while either shift is being operated, a portion 72 of the transverse-support, vbut to clear this portion by perhaps a hundredth of an inch when in lockeol'position. This very slight lost motion is suflicient to permit the movementabove described, to unlock'one shift by depressing the other. Thus, wheneither would natur lly forcecithe' lever downward I in attempting to, unlock Tithe. capital "shift oftheshift leversis operated the yoke '20 is rocked forwardwcausingthe arm 70 and set screw '71 toucoine into contact withthe stationary portion of the-machine, thereby preventing further rocking or tilting of the yoke.

I positionishowniin Fig. 3 and the yoke being or brackets 66, attached to any cong; the frame of the m'a-ari The locking levers, 63 and" 64, are also supplied with springsv about theirLpiv-j ots 67 which will normally disengage or un hook the lower end 65 ofthe levers from -the capitalshiftkeylever Sis inits lowest of the yoke in orderftodepress the figure shift'keyleverd. '.This rocking, as above stated," beingprevented, it is evident'that if position as ,shown'in' Fig. 3 and not preconnecting link 13 and consequently will return this part of the mechanism to normal position and shift the carriage to a position for printing figures. Should there be no return spring on this mechanism to return the carriage to its normal position, it would be possible by placing the fingers on bothshift key levers to alternatelv press them, thus moving the carriage directly from lower keys to upper keys.

For typewriting machines of the Noiseless character, or machines employing three-type to each type carrier, it becomes necessary to accurately register or stop the carriage in the three different printing positions.

The means for registering the carriage in its central position is embodied directly in' the shift mechanism structure, and attention is directed particularly to Fig. 2 of the drawings in. which it will be seen that the rocking member 17 forms one end for toggles composed of the shift key levers and connecting links. The shift key levers are secured to a stationary bracket and it will, therefore, be seen that the rocking.

member cannot be rotated by any force applied to the long arm of this member. The toggles in extended position, therefore, form a stop mechanism for the carriage in central position for printing small or lower case characters. The springs 34 and 36 serve to hold the centers of the toggles in alinement, thereby preventing vibration or rebound of the carriage common in many shift mechanisms of other makes. 7

For accurately registering the carriage in upper and lower position, attention is directed to detail view, Fig. 6. In this structure one of the connecting links 32 supporting the carriage shift rail carries an arm 73 securely held in adjusted positions by upper and lower check nuts 74. At the extreme end of this arm are oppositely disposed truncated conical members 75 free to move sidewis a trifle, and also to rock slightly on this member. Secured in a bracket 76 or other relatively fixed part of the frame, is a, threaded stud 77 having secured thereon two arms 78 as shown. These arms are adjustably positioned in a vertical direction through adjusting and check nuts 80, as shown, and are provided at their outer ends with pockets 81 into which the conical members 75 carried by the arm 73 are adapted to pass and fit, thus arresting the up-and-down movement of the link 32 and the vertical movement of the carriage supported thereby. It is, of course, to be understood that only one comcal assists with one pocket at a time atthe extreme end of the movement. By I having these stops tapered or of cone shape,

the contactwill be made at the sides of the cone rather than on the truncated bottom or end portion, for it will readily be'seen that a contact on the bottom would not be sulficiently noiseless in its operation. The adjustment of the arms and cones carried thereby, is accomplished by raising and lowering the same on. the link 32, in order to bring the relation of the capitals and figures in correct alinement with the small letters by the combination of adjustments secured by the elements named. The slight freedom be tween the cones and the arm upon which they are carried, is desirable inasmuch as it would be a difiicult matter to secure an alinement between the pockets and the cones which would insure an accurate register.

The pivotal bearings and pivotal connections associated with this shifting mechanism have been developed with the view of securing a pivot which would be perfectly free to rotate and still have no side orlateral movement to cause inaccuracies in the shifting of the carriage. In Fig. 5 of the drawings there are shown several forms of pivots and pivotal connections used for links throughout this structure. The central pivot 18 is in the form of a stud having a long conical head 83 on one end, the opposite end being threaded to receive a conical nut 84 of the same taper as the head. The'holes in the yoke 20 carrying the rocking member 17 are. of course, tapered and reamedto fit the conical head and nut of the stud upon which the rocln'ng member is adapted to turn. The portion of-this screwand nut which project inside of the yoke or between the arms thereof, carries a rocking member, the hub of the rocking member having been reamed to fit on the portion of the conical head of the screw and nut. The yoke which is made of more or less flexible material, is, before being assembled. somewhat wider than shown in Fig. 5. The conical nut after passing through the rocking member is tightened to draw the arms toward each other until a tight fit is secured in the hub of the rockin member. This makes a very substantial and free working pivot, and when the desired adjustment is secured it is locked by an outside check nut 85 which is also assembled on the threaded portion of the screw stud 18.

The pivotal connection at the lower part of the figure comprises the Screw 21 and an opposite pivot point 86, this being the connection between theyoke and the bracket 22 supporting it. The yoke is provided with depressions, or holes, into which the points fi as these connections must be absolutely free pivotal connection is shown atthe top of ig. and com rises a screw 15fhav1ng a taper portion c ose to its hexagonal head,

the ta or being approximately degrees on the si e. The end (portion of the connecting link'la is provide with a hole or opening reamed to fit the tapered portion of the screw. This form ofpivotal connection can by means of a-check nut 94 engagln be adjusted to any desired nicety and checked by means of a nut 87 on the vo'pposlte side. a Y

In Fig. 7 there is shown an enlarged view of the end mounting of the main shift rock shaft 27. The end of the rock shaft is pro' vided with a reduced portion 90 and aball raceway 91 coacting w1th a cup-shaped ball container 92 threaded into a side bracket 93 of the frame; and held in adjusted positign t e bracket. An annular ring 95 surroun s the or inner side to protectthe bearings 96 from dust and dirt.

It is believed that from the above description the method of use of this shiftin mechanism is perfectly clear, and a furt er de tailed description thereof is unnecessary. The device is simple and practical in its operation, is cheap to manufacture and assemhis, and is believed to accomplish, among others, all of the objects and advantages above set forth.

As many changes could be made in the above construction and many apparently widely difl'erent embodiments of this inven-' tion could be made without departing from the scope thereof, it is intended'that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

aving described my invention, 'what I claim as new and desire to secure by Letters Patent is:

1. In a typewriting machine, in combination, a carriage shift rail having anormal intermediate position, shift keys for moving the rail in opposite directions, and trains of connections between the keys and rail, including a floating lever common to the trains of connections and floating links intermediate the lever and said shift keys.

2. In a typewriting machine, in combina tion, a carriage rail having anorm'al intermediate posltion, shift keys for moving the rail in opposite directions, and

intermediate the lever and said shift keys, I

said floating links formingwithth'e shift key levers a pair oftoggles adapted to lie roper intermediate substantiallyj in extended position .when Y said rail isin said' intermediate position. 3. ,Ina typewriting machine in combina- ',tions between the keys and rail, including shift-keylevers, a,- floating link at theend of each of said levers and a floating lever to which said links are connected, said shift .levers crossing each other to obtain a better leverage on said floatinglever. 4. Ina typew-nting machine, in combination, a carriage shift rail having a 'noal intermediate position shift keys for moving the rail in opposite directions, and-connections between the keys and rail, including crossed shift key levers pivoted to diflerent arts of a" fixed support, floating links orming extensions to-said shift levers, a floating lever to which the ends of said links 5. In a typewriting machine,in combinaing the rail in opposite directions, and connections between the keys and rail including shift key levers and floating links forming a pair of tpggles occupying a normally extendlng position, one of said toggles adapted to act as a brace when the other of said toggles is flexed to shift .the shift rail...

6. In a typewriting machine in combination, a shift rail, a shift shaft, a floating lever connected with said shaft, floating links connected with diflerent parts of said lever, and shift key levers connected to said floating links for actuating said levers, said links and shift levers forming toggles normally occupying extended position,

7. In a typewriting machine, in combination, a shift rail, a shift shaft, a floating lever connected with said shaft, floating links connected with difl'erent parts of said lever, shift key levers connected to said floating links for actuating said links, said links and shift levers forming toggles occupying a normally extended position, and

means adapted to prevent an overthrowof said toggles whereby one toggle'acts as a brace when the other toggle is flexed in moving the .shift rail. 7

8. In a typewriting machine, in combination, a shift rail, a shift shaft, a floating lever -.-connected with said-shaft, floating" links connected with difl'erent' parts of said lever, shift key levers. connected to said links and shift levers forming toggles occupying a normally extended position, and

are connected and aconnection between said 0 floating lever and said shift rail. ball retainer 92 flanged over on its opposite floating links for .actuating said lever, said I return springs connected with said shift levers adapted to hold the same in normal position.

I ,9. In a typewriting inachine,'in combina normal intermediate position, connections between the rail and keys comprising shift key levers and links connected therewith forming'toggles occupying a normally extended position, one-of said toggles adapted to be flexed when the connecting key is depressed, while the other acts as a brace, and means for returning the depressed key to normal positionwhen the other key is actuated.

11 In a typewriting machine, in combination, a shift rail adapted to be moved in opposite directions from a normal intermediate position,-a support for said rail, an arm carried ;b said support, two relatively movable mem ers carried by said arm, two recessed members spaced apart adapted to be engaged by said members when the shift rail is shiftedfor silently arresting the movement of the shift rail, and means for adjusting the position of said recessed memers.

12. In a typewriting machine, in combination, a shift rail adapted to be moved in opposite direction from a normal intermediate position, a support for, said rail, an arm carried by said support, two conical members carried by said arm, two'recessed members spaced a art adapted to be engaged by said conical members when the shift rail is shifted for silently arresting the movement of the shift rail, and means for independently adjusting the recessed members. i v

13. In a typewriting machine, in combination, a shift rail adapted to be shifted in opposite direction from a normal intermediate position, shift key levers, locking keys carried by, said shiftkey levers for locking the shift rail in shifted position, and means for releasing the shift key look by depressing the othershiftkey lever.

14. In a typewriting machine, in combination, a shift rail adaptedto be shifted in opposite direction from a normal intermediate position, shift ke levers in the keyboard of the machine, 100 'ng keys carried by said shift key levers adapted to lock the shift rail in shifted position, and operative connecting means between the opposite ends of said-shift key levers whereby the locked shift key lever is released on depressionof the other shift key lever. y

15. In a typewrlting machine, in combination, a shift rail adapted to be shifted in opposite direction from a normal intermediate position, shift key levers in the keyboard shift key levers adapted to lock' the shift rall in shifted position, and a'connection between the opposite ends of said shift key levers whereby the locked shift key lever .is

released on depression of the other shift key lever, said connection comprising a floatlever and said shift key levers.

16. In a typewriting machine, in combiof the machine, locking key carried by said i ing lever and floating links intermediate the i nation, a shift rail adapted to beshifted in opposite direction from a normal interme- .of said floating links and the lever to which it is connected, forming a toggle occupying an extended position whereby pressure applied to the shift key lever connected there'-' with, will tend to further flex the toggle formed by the other floating link and shift key lever. 7

17. In a typewriting machine, in combination, a shift rail, shift key levers on one side of the-keyboard for moving the shift rail in opposite direction from a normal intermediate position, an, auxiliary shift key lever on the opposite side of the keyboard. connected with said shifting mechanism for shifting the shift rail in one direction only, the connection between the. said auxiliary shift key and shift railcom risin a bell crank lever, a link connected t erewlth, and a lost-motion device between said auxiliary shift key and the corresponding shift key at the opposite side of the keyboard whereby one may be operated independently of the other.

18. In a typewriting machine, in combination, a shift rail, shift key levers on one side of the'keyboa rd for moving the shift rail in opposite direction from a normal intermediate position, an auxiliary shift key lever on the opposite side of the keyboard connected with said shifting mechanism for shifting the shift rail in one direction only, the connection between the said auxiliary shift key and shift rail comprisin a bell crank lever, a link connected therew th, and

diate position, shift ke levers in the key- I diate position, shift key leversat one side of the keyboard for controlling said movement, an auxiliary shift key at the oppos te side of the keyboard for shifting the shift rail in one direction only, a rock shaft upon which said auxiliary shift key is mounted, and an adjustably mounted s ring connected with-said rock shaft for ho ding the same in normal position.

20. In a typewriting machine, in combination, a shift rail adapted to be shifted in opposite direction from a normal intermedlate position, shift key levers at. one side of the keyboard for controlling said movement, an auxiliary shift key at the opposite side of the keyboard for shifting the shift rail in one direction, a rock shaft upon which said auxiliary shift key is mounted, and an adjustable stop connected with said auxiliary key adapted to determine its initial position and silently arrest its return to sald position after being depressed.

21. In a typewriting machine, in combination, a shift rail, .a shift key in'the keyboard of the machine, an intervening rock shaft connected with both of said parts, ball bearings supportin the ends of said rock shaft, an ad uStab e ball raceway for said bearingsmovable in the direction of the length of the rock shaft, and a housing for said bearings surrounding said raceway.

22. In a typewriting machine, in combination, a carriage having a normal intermediate position, shift keys for moving the carriage in opposite directions, connections between the keys and carriage including two toggles extended in said normal position, means whereby said carriage may be locked in shifted posltion, said elements being constructed and arranged so that upon actuation of one of said shift keys the carriage may be moved directl from a locked position of shift on one si e of said intermediate position to a position of shift on the other side thereof.

23. In a typewriting machine, in combination, a carriage having a normal intermediate position, shift keys for moving the carriage in opposite directions, connections between the keys and carriage including two toggles extended in said normal position, a plurality of stops having cooperative mclined surfaces adapted to arrest the movement of the carriage shifted position means whereb said carriage may be locke in shifted position, said elements being constructed and arranged so that upon actuation of one of said shift keys the carriage may be moved directly from a locked position of shift on one side of said intermediate position to a position of shift on the other side thereof.

24. In a typewriting machine, the combination with a shiftable part having three printing positions, of two to gles, a lever connected with the free ends 0 said toggles, means including a key for breaking one of said toggles to shift said part to one of said positions, means including another key for reaking the other of said toggles to shift said part to another of said positions, and locking means for each of said keys to hold said part in shifted position, said toggles and lever being so constructed and arranged as to permit release of either of said locking means by actuation of the other key. I

25., In a typewriting machine, the combination with a shiftable part having three printing positions and shift key levers, of a triangular floating lever at the rear of the machine having one apex connected with said part and its other apices disposed in a substantially vertical plane .and connected with said shift key levers.

26. In a typewriting machine, in combination, a part shiftable to difierent case positions, a pair of shift key levers extending along the base of the machine, and means including alever at the rear of the machine beneath said part and having a movably supported axis, said lever being connected with said key levers and with said part for shifting the latter.

27. In a typewriting machine, the combination of a shiftable part having. three printing positions, of two separate toggles which when both of them are extended hold said part in a middle position, means for breaking said toggles to move. said part to its extreme ositions, and locking means associated wit said last-mentioned means to retain said part in extreme positions, said elements being so constructed and arranged as to permit release of said locking means by actuation of the means to move said part to opposite extreme position.

In testimony whereof I afix my signature, in the presence of two witnesses.

. NILS II. ANDERSON.

Witnesses:

WM. I-I. Burrows, A. G. W. 

